What is the difference between light magnesium oxide and heavy magnesium oxide?

Magnesium Oxide is an ionic compound composed of magnesium and oxygen elements, belonging to the category of alkaline oxides. Commonly known as bitter soil, also known as Magnesium Oxide. The chemical formula MgO has high fire resistance and insulation performance, is slightly soluble in water, and is placed in the air. It is easy to absorb water and gas and gradually becomes basic Magnesium Carbonate. Therefore, before and after use, during transportation, it should be sealed and stored in a dry and ventilated environment.The difference between lightweight magnesium oxide and heavy magnesium oxide is mainly reflected in the following aspects:

1. Volume: Lightweight magnesium oxide has a large volume and a white amorphous powder appearance, which is usually used in mid to high end industries. Heavy magnesium oxide has a small volume and is a white or beige powder, which will be used in low-end industries.

2. Stacking density: The stacking density of lightweight magnesium oxide is generally 0.2g/ml, and the stacking density of heavy magnesium oxide is generally 0.5g/ml.

3. Properties: Lightweight magnesium oxide has a large volume, fluffiness, and is difficult to dissolve in pure water and organic solvents, but can dissolve in acid and ammonium salt solutions. Transformed into crystals by high-temperature burning. Heavy magnesium oxide has a small volume, is dense, and is easy to combine with water. When exposed to air, it is easy to absorb water and carbon dioxide. Mixing with magnesium chloride solution is prone to gelation and hardening.

4. Preparation process: Lightweight magnesium oxide is generally produced by converting magnesium chloride, magnesium sulfate, or magnesium bicarbonate into a water-soluble product, then chemically converting it into an insoluble product, and then calcining it to form magnesium oxide. The resulting product has a low bulk density. Heavy magnesium oxide is generally formed by direct calcination of magnesite and brucite, with a bulk density of 0.5g/ml.